afec_xdmac_example.c File Reference

AFEC XDMAC example for SAM.

Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.

#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "asf.h"

Macros
#define	AFEC0_XDMAC_CH_NUM   35
	XDMAC channel HW Interface number for AFEC0. More...
#define	BUFFER_SIZE   100
	The buffer size for transfer. More...
#define	MAX_DIGITAL   (4095UL)
	The maximal digital value. More...
#define	STRING_EOL   "\r"
#define	STRING_HEADER
#define	VOLT_REF   (3300)
	Reference voltage for AFEC,in mv. More...
#define	XDMAC_CH   0
	XDMAC channel used in this example. More...

Functions
static void	afec_callback (void)
	Callback function for AFE interrupt. More...
static void	afec_xdmac_configure (Afec *const afec)
	configure xdmac for afec. More...
static void	configure_console (void)
	Configure UART console. More...
int	main (void)
	Application entry point. More...
void	XDMAC_Handler (void)
	XDMAC interrupt handler. More...

Variables
static uint32_t	afec_buf [BUFFER_SIZE]
static xdmac_channel_config_t	xdmac_channel_cfg
	XDMAC channel configuration. More...

#define AFEC0_XDMAC_CH_NUM   35

XDMAC channel HW Interface number for AFEC0.

Referenced by afec_xdmac_configure().

#define BUFFER_SIZE   100

The buffer size for transfer.

Referenced by afec_callback(), and afec_xdmac_configure().

#define MAX_DIGITAL   (4095UL)

The maximal digital value.

Referenced by afec_callback().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"-- AFEC XDMAC Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

#define VOLT_REF   (3300)

Reference voltage for AFEC,in mv.

Referenced by afec_callback().

#define XDMAC_CH   0

XDMAC channel used in this example.

Referenced by afec_xdmac_configure(), and XDMAC_Handler().

static void afec_callback ( void  )

static

Callback function for AFE interrupt.

References afec_buf, BUFFER_SIZE, MAX_DIGITAL, and VOLT_REF.

Referenced by XDMAC_Handler().

static void afec_xdmac_configure ( Afec *const  afec )

static

configure xdmac for afec.

Parameters

afec	Base address of the AFEC

References AFEC0_XDMAC_CH_NUM, afec_buf, BUFFER_SIZE, xdmac_channel_config_t::mbr_bc, xdmac_channel_config_t::mbr_cfg, xdmac_channel_config_t::mbr_da, xdmac_channel_config_t::mbr_ds, xdmac_channel_config_t::mbr_dus, xdmac_channel_config_t::mbr_sa, xdmac_channel_config_t::mbr_sus, xdmac_channel_config_t::mbr_ubc, pmc_enable_periph_clk(), XDMAC_CH, xdmac_channel_enable(), xdmac_channel_enable_interrupt(), xdmac_channel_set_descriptor_control(), xdmac_configure_transfer(), xdmac_enable_interrupt(), XDMAC_UBC_NDE_FETCH_DIS, XDMAC_UBC_NDEN_UPDATED, and XDMAC_UBC_NVIEW_NDV0.

Referenced by main().

static void configure_console ( void  )

static

Configure UART console.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_CHAR_LENGTH, CONF_UART_PARITY, CONF_UART_STOP_BITS, CONSOLE_UART_ID, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

int main

(

void

)

Application entry point.

Returns

Unused (ANSI-C compatibility).

References afec_ch_get_config_defaults(), afec_ch_set_config(), afec_channel_enable(), afec_channel_set_analog_offset(), afec_enable(), AFEC_GAINVALUE_0, afec_get_config_defaults(), afec_init(), afec_set_trigger(), afec_temp_sensor_get_config_defaults(), afec_temp_sensor_set_config(), AFEC_TRIG_FREERUN, afec_xdmac_configure(), board_init(), configure_console(), afec_ch_config::gain, afec_temp_sensor_config::rctc, STRING_HEADER, and sysclk_init().

void XDMAC_Handler

(

void

)

XDMAC interrupt handler.

References afec_callback(), XDMAC_CH, and xdmac_channel_get_interrupt_status().

uint32_t afec_buf[BUFFER_SIZE]

static

Referenced by afec_callback(), and afec_xdmac_configure().

xdmac_channel_config_t xdmac_channel_cfg

static

XDMAC channel configuration.